package org.linphone.compatibility;

/*
CompatibilityScaleGestureDetector.java
Copyright (C) 2017 Belledonne Communications, Grenoble, France

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

import android.content.Context;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;

public class CompatibilityScaleGestureDetector
        extends ScaleGestureDetector.SimpleOnScaleGestureListener {
    private ScaleGestureDetector detector;
    private CompatibilityScaleGestureListener listener;

    public CompatibilityScaleGestureDetector(Context context) {
        detector = new ScaleGestureDetector(context, this);
    }

    public void setOnScaleListener(CompatibilityScaleGestureListener newListener) {
        listener = newListener;
    }

    public void onTouchEvent(MotionEvent event) {
        detector.onTouchEvent(event);
    }

    @Override
    public boolean onScale(ScaleGestureDetector detector) {
        if (listener == null) {
            return false;
        }

        return listener.onScale(this);
    }

    public float getScaleFactor() {
        return detector.getScaleFactor();
    }

    public void destroy() {
        listener = null;
        detector = null;
    }
}
